
What is focus in Java Swing?
Focus is the mechanism that determines which of the components in a window will receive keyboard input events. A focus manager looks for special keystrokes that change the focus (usually the Tab and Shift-Tab keys), and then decides which component will next get the focus.
How do I get focus in Java?
To obtain the focus, you have to ask focus after the add of the component but before the display of the window. Before Java 1.4, you needed to use the requestFocus() method, but now it is not a good idea to use it, because it give also focus to the window of the component, and that's not always possible.
What does focus code mean?
Focus is a gauge above the Stamina gauge that modifies your weapon's attack when activated. To obtain Focus, finesse actions are required (like dodging a moment before an attack hits), though taking large damage from an attack can also contribute to your Focus build-up.
What is keyboard focus java?
When a Swing GUI is displayed then the GUI must decide which text component should have focus, and it uses its focus traversal policy to decide this. The default policy usually will put the focus into the first text field created.
Can you focus a div?
Yes - this is possible. In order to do it, you need to assign a tabindex...
How do you focus a text box in Java?
For me the easiest way to get it to work, is to put the component. requestFocus(); line, after the setVisible(true); line, at the bottom of your frame or panel constructor.
What is input focus?
Any element (most commonly s and
What is focus on a Web page?
Focus refers to which control on the screen (an input item such as a field, checkbox, button, or link) currently receives input from the keyboard, and from the clipboard when you paste content.
How do you set focus on input field?
To set focus to an HTML form element, the focus() method of JavaScript can be used. To do so, call this method on an object of the element that is to be focused, as shown in the example. Example 1: The focus() method is set to the input tag when user clicks on Focus button.
How do you change the focus in Java?
Try this:Click the Launch button to run FocusConceptsDemo using Java™ Web Start (download JDK 7 or later). ... If necessary, click the window to give it the focus.Move the focus from component to component using the Tab key. ... Move the focus out of the text area using Control-Tab.More items...
What is a component Java?
A component is an object having a graphical representation that can be displayed on the screen and that can interact with the user. Examples of components are the buttons, checkboxes, and scrollbars of a typical graphical user interface.
How do I add a keyboard shortcut in Java?
To add the shortcut keys for an action, click on the action to select the action, then press the keys that you want to associate with the action. To disable the shortcut keys for an action, click on the action to select the action, then press Back Space.
How do you change the focus in Java?
Try this:Click the Launch button to run FocusConceptsDemo using Java™ Web Start (download JDK 7 or later). ... If necessary, click the window to give it the focus.Move the focus from component to component using the Tab key. ... Move the focus out of the text area using Control-Tab.More items...
How do I focus an element in selenium?
In selenium we can send some empty key to a element to focus.WebElement myelement = driver.findElement(By.id("element-id"));//Send empty message to element for set focus on element.myelement. sendKeys("");
How do you change focus in selenium?
Selenium driver object can access the elements of the parent window. In order to switch its focus from the parent to the new popup tab, we shall take the help of the switchTo(). window method and pass the window handle id of the popup as an argument to the method.
How do you use JDialog?
The JDialog control represents a top level window with a border and a title used to take some form of input from the user. It inherits the Dialog class....Commonly used Constructors:ConstructorDescriptionJDialog()It is used to create a modeless dialog without a title and without a specified Frame owner.2 more rows
3 Answers
As the others have already pointer out, there is no portable way to get this on all platforms. But to make things worse: There not even a consistent way on MS Windows. I will provide some code that will solve the problem for different platforms and will point out the limitations.
Windows
The answer provided by kichik was correct at its time but will not work with Windows 8 in all cases. The problem is, that it will not handle Metro apps correctly. Unfortunately there is currently no stable API to get the name of the currently running Metro app.
Mac OS X
Mac OS X does not focus on windows but on applications. So it makes sense to ask for the currently active application. Older versions of Mac OS X provide multiple desktops. Newer versions can have multiple fullscreen applications open at the same time. So you might not always get a correct answer.
Conclusion
When I played around with this code, it worked in the most basic cases. But if you want this code to run reliable, you will have to put in a lot of polish. Decide for yourself if it is worth it.
